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This scope does not use batteries. It uses an IR or Illuminated Reciprocation. The light available is guided through a light track and illuminates the dot. The setting adjustment is used to allow less or more light through to illuminate.
The IR Rangefinding Reticle is based on the military reticle that ranges tanks, believe it or not, front to back--whatever line the tank fits between will give the range to it...but the reticle has been adapted for use in some riflescopes. Trying to define the math behind rangefinding and downrange zeroing with multi-stadia reticles is complicated and takes some study to fully grasp the concepts, which is why I have a constantly available on-line article, entitled, "Tactical Ballistic and Ranging Reticle Analysis," right here-- http://specialtypistols.infopop.cc/Reticle_Ranging___App.pdf
This scope will use a 1.5 volt button battery that is 4.2 mm thick and from 11 to 16 mm wide. A thin rubber washer can be used with a V386 battery or a LR43. Both are 11.6 mm by 4.2. My scope came with a thin 16x12 mm ring made of plastic so that the battery would be held firmly into the center position. After a close inspection, it is possible that a similar sized battery that is 3.6mm thick/thin might work also, but would have a shorter life due to less capacity.
I hope this is helpful. If not, I would be happy for you to sell me your scope for another gun of mine! :-)
They are for sighting in the rifle only.I know on TV the shooter reaches up and turns a knob.BOGUS! after sighting in the rifle, always replace the little caps because the scope is not sealed unless the caps are on.without the caps, moisture can penetrate the scope and fog the lenses.Good Luck
Well, it Barska says it's .50 cal proofed, whatever that means. One would presume it could take 30 magnum recoil then.
On the other hand, Barska is a low end quality manufacturer. You cannot expect durability in a low end scope. Of course, you could get lucky.
Unless you're target shooting at an immovable object, 10x - 40x is much more power than you'll ever be able to use. You're much, much better off considering a 4x - 16, for instance, in a higher end scope line than this scope.
Consider that at 40x the exit pupil would only be 1.25 which would make even the highest quality scopes quite dim. Barska won't have be best glass in the world and so would probably be unusable beyond some level like 18x unless in very favorable conditions anyway.
The problem with heavy recoilers and scopes is that the heavier the scope the more likely it is to take damage due to recoil. It's because it hangs out there on those high scope rings, and is heavy.